3 citations · 3 across the 1 of their papers we have counts for
7 papers · 1 filter
A search for wide brown dwarf companions to stars within 10pc
Marin Treselj, Andreas Seifahrt, Klaus-Werner Hodapp +2
We present the first results of a large imaging survey to identify wide brown dwarf companions to stars within 10 pc. We have performed a deep (H-band limit ~ 19.0 mag), wide field…
Activity and rotation of low mass stars in young open clusters
Andreas Seifahrt, Ansgar Reiners, Aleks Scholz +1
We present first results from a multi-object spectroscopy campaign in IC2602, the Hyades, the Pleiades, and the Coma cluster using VLT/FLAMES. We analysed the data for radial veloc…
High Precision Radial Velocity Measurements in the Infrared: A First Assessment of the RV Stability of CRIRES
Andreas Seifahrt, Hans-Ulrich Kaeufl
High precision radial velocity (RV) measurements in the near infrared are on high demand, especially in the context of exoplanet search campaigns shifting their interest to late ty…
A Hubble Space Telescope transit light curve for GJ436b
J. L. Bean, G. F. Benedict, D. Charbonneau +6
We present time series photometry for six partial transits of GJ436b obtained with the Fine Guidance Sensor instrument on the Hubble Space Telescope (HST). Our analysis of these da…
Confirmation of the binary status of Cha Halpha 2 - a very young low-mass binary in Chamaeleon
T. O. B. Schmidt, R. Neuhäuser, N. Vogt +3
Neuhaeuser & Comeron (1998, 1999) presented direct imaging evidence, as well as first spectra, of several young stellar and sub-stellar M6- to M8-type objects in the Cha I dark clo…
Improved orbital solution and masses for the very low-mass multiple system LHS 1070
A. Seifahrt, T. Roell, R. Neuhaeuser +5
We present a refined orbital solution for the components A, B, and C of the nearby late-M type multiple system LHS 1070. By combining astrometric datapoints from NACO/VLT, CIAO/SUB…